/****************************************************************************
 * Copyright 2009 Huascar A. Sanchez                                        *
 *                                                                          *
 * Licensed under the Apache License, Version 2.0 (the "License");          *
 * you may not use this file except in compliance with the License.         *
 * You may obtain a copy of the License at                                  *
 *                                                                          *
 *     http://www.apache.org/licenses/LICENSE-2.0                           *
 *                                                                          *
 * Unless required by applicable law or agreed to in writing, software      *
 * distributed under the License is distributed on an "AS IS" BASIS,        *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
 * See the License for the specific language governing permissions and      *
 * limitations under the License.                                           *
 ****************************************************************************/
package com.gotobject.filter.predicate;

/**
 * @author huascar.sanchez@gmail.com (Huascar A. Sanchez)
 */
public interface Predicate<T> {
    /**
     * mix two conditions via the {@code and} operator.
     * @param thing
     *      the second predicate to be mixed.
     * @return
     *    composed predicate made of two conditions, connected
     *    via the {@code and} operator.
     */
    Predicate<T> and(Predicate<? super T> thing);

    /**
     * applies the predicate.
     * @param thing
     *      object to be evaluated by the predicate.
     * @return
     *      {@code true} if the object complied with
     *      the predicate.
     */
    boolean apply(T thing);

    /**
     * mix two conditions via the {@code or} operator.
     * @param thing
     *      the second predicate to be mixed.
     * @return
     *    composed predicate made of two conditions, connected
     *    via the {@code or} operator.
     */
    Predicate<T> or(Predicate<? super T> thing);
}
